You mentioned it worked great 3 weeks ago? Then you said chimney has 1/2 soot in it. So now you have a 5 inch chimney, I think this may be the problem. I had a wood boiler 30 years ago which was a fireplace insert boiler, never worked good so I moved it out into the room and had a 6 inch pipe into old brick chimney. Worked good for about 2 months then all was clogged with soot. Clean and brush once a month, lots of maintenance. Finally I put a 8 inch base plate with 8 inch black stove pipe in room then 8 inch stainless insulated inside old brick chimney, wow what a difference. I went with outside boiler 5 years ago, fully automatic except adding wood. As I said above added steel well pipe for chimney but no good, now 8 inch stainless insulated and wow does it heat. I can bring 650 gallons from 70 degrees to 190 degrees in about 3 hours when I fire it up in the fall. That's with about 1/3 of a full firebox also. Hope you get it working better.
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Topic: Water Temp not moving up? (Read 6684 times)